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Introduction to the Basic Encoder
Instruction Manual: evolution 5000 E57xx DSNG and DENG Voyager Encoder Page 1-13
ST.TM.E10076.3
Table 1.6: Dolby Digital Audio Encoding Bit-rates
Bit-rate
(kbit/s)
Single Channel
Mono (1/0)
Dual Channel
Stereo (2/0)
56 3 -
64 3 -
80 3 -
96 33
112 33
128 33
160 33
192 33
224 33
256 33
320 33
384 33
448 33
512 33
576 33
640 33
1.3.3 Vertical Blanking Interval (VBI) Line Processing
Modes
Introduction
The Encoder has three modes for processing VBI lines.
NOTE…
A maximum of eight VBI lines per field may be extracted. This limit does not apply to Teletext.
VBI in Picture
By selecting the VBI in Picture extended active picture format available in
the MPEG 4:2:2 specification the Encoder compresses and transmits the
VBI data as part of the active picture. This mode requires up to 3 Mbit/s of
extra bit-rate, depending on the amount and complexity of the VBI
present.
NOTES…
1. VBI in Picture transmits the VBI waveform as part of the picture and as such will be subject to
some distortion. Most analogue VBI types are robust against this type of distortion but others,
e.g. video index, are intended for SDI transmission and will not survive MPEG coding/decoding
in VBI in Picture mode. VITS test signal and ghost cancellation signal will become corrupted.
2. VBI in Picture is not supported when 3:2 Pulldown is active.